diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/bouncycastle/extensions/OpenPGPKeyExtensions.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/bouncycastle/extensions/OpenPGPKeyExtensions.kt
index 305bca15..06a7e8ed 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/bouncycastle/extensions/OpenPGPKeyExtensions.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/bouncycastle/extensions/OpenPGPKeyExtensions.kt
@@ -7,10 +7,15 @@ package org.pgpainless.bouncycastle.extensions
 import org.bouncycastle.openpgp.PGPPublicKeyEncryptedData
 import org.bouncycastle.openpgp.PGPSignature
 import org.bouncycastle.openpgp.api.OpenPGPKey
+import org.bouncycastle.openpgp.api.OpenPGPKey.OpenPGPPrivateKey
 import org.bouncycastle.openpgp.api.OpenPGPKey.OpenPGPSecretKey
+import org.pgpainless.util.Passphrase
 
 fun OpenPGPKey.getSecretKeyFor(pkesk: PGPPublicKeyEncryptedData): OpenPGPSecretKey? =
     this.getSecretKey(pkesk.keyIdentifier)
 
 fun OpenPGPKey.getSecretKeyFor(signature: PGPSignature): OpenPGPSecretKey? =
     this.getSecretKey(signature.fingerprint!!.keyIdentifier)
+
+fun OpenPGPKey.OpenPGPSecretKey.unlock(passphrase: Passphrase): OpenPGPPrivateKey =
+    this.unlock(passphrase.getChars())